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fzx2008: ½ð±Ò+5, ллָµ¼ 2014-10-30 18:31:34
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fzx2008: ½ð±Ò+5, ллָµ¼ 2014-10-30 18:31:34
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????? fundamental bandgap (??B?????I???????????^?? bandgap or energy gap) ???x??: ???????????????????¦Ê???????A ??????f????? bandgap ????? -> VBM - CBM VBM: valence band maximum CBM: conduction band minimum DFT ????r?? ???????^ Eg = I - A = E(N+1) + E(N-1) - 2E(N) ????? bandgap (Eg) I: ionization potential A: electron affinity optical bandgap (??W?I?????P) ???x??: ?????¦Ã? ??????? (electron-hole pair) ???§³???????? ??r?? ??????? ????????B?? (bounded) electronic bandgap (??W?I?????P?????? transport gap) ???x??: ?????¦Ã? ??????? ?K??? ?????? ?K?????????? (unbounded) ?????Y?? http://en.wikipedia.org/wiki/Band_gap |
2Â¥2014-10-30 07:06:17













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